description IPFS Overview
IPFS, the InterPlanetary File System, is a peer-to-peer system for addressing and transferring data. Files can be divided into blocks identified by their contents, allowing a requested block to be retrieved from a peer that holds it. This differs from relying only on a conventional web address tied to one server, and it can reduce dependence on a single hosting location when data is available from multiple peers. Developers use IPFS in decentralized applications, including Web3 projects, while researchers may explore it for sharing datasets.
Content identifiers help verify that retrieved data matches the requested content, but they do not automatically encrypt files or guarantee permanent storage. Someone must continue hosting or pinning the data for it to remain available. Its resilience therefore depends on actual replication and access, rather than files being automatically spread across the entire network.
help IPFS FAQ
What does an IPFS CID actually identify?
A CID identifies content by its hash, not by the server where it lives. If the file changes, the CID changes too, which is different from a normal HTTPS URL that points to a location.
Does uploading a file to IPFS make it permanent?
No, IPFS does not guarantee permanence by itself. At least one node must keep hosting or pinning the content, which is why services such as Pinata, web3.storage, or Filecoin-based storage are often used.
How is IPFS different from BitTorrent?
IPFS and BitTorrent both use peer-to-peer distribution, but IPFS builds a broader content-addressed web with CIDs, links, and gateways. A public gateway can let a normal browser load IPFS content over HTTPS without running a local node.
Why do NFT projects use IPFS for metadata and images?
NFT projects often store metadata JSON and image files on IPFS so the token points to a content hash instead of a private web server. The risk is that the CID still needs pinning, or the asset may become hard to retrieve even though the blockchain token remains.
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